(2/3)•2/7-2:2=

To solve this expression step by step:

1. Start by simplifying the multiplication of \( \frac{2}{3} \) and \( \frac{2}{7} \):

\( \frac{2}{3} \times \frac{2}{7} = \frac{4}{21} \)

2. Next, simplify the division of 2 by 2:

\( \frac{4}{21} - 1 = \frac{4}{21} - \frac{21}{21} = \frac{4-21}{21} = \frac{-17}{21} \)

Therefore, the result of the expression \( \frac{2}{3} \times \frac{2}{7} - \frac{2}{2} \) is \( -\frac{17}{21} \).